240 NORTH AMERICAN OEDIPODINAE (ORTHOPTERA; ACRIDIDAE) 



combined dorsal length of the head and pronotum, subequal in width, subde- 

 pressed proximad. 



Pronotum weakly sellate, sub-strangulate, with dorsum rugose, the dorsal 

 length faintly less than the dorsal length of the head, the greatest (caudal) 

 width of the disk but slightly less than the greatest dorsal length: cephalic 

 margin of disk very weakly, though finely, obtuse-angulate ; caudal margin 

 of disk sub-rectangulate, the immediate angle narrowly rounded, the margin 

 appreciably cingulate : median carina distinct but not high on the metazona, 

 elevated and moderately bilobate on the prozona, the cephalic section of this 

 about half again as long as the caudal (or mesozonal) one, the former Ijut little 

 higher than the latter and subdeclivent cephalad, the caudal (or mesozonal) 

 section more regularly arcuate; lateral carinae indicated by converging, low, 

 irregular elevations cephalad on the prozona, on caudal (or mesozonal) 

 section of prozona is a distinct, transverse raised area with a pair of 

 impressed pits, lateral shoulders on metazona distinct, rather prominent, 

 noncarinate: metazona slightly longer than the prozona. Lateral lobes of 

 pronotum deeper than long, ventral margin sinuate, the greatest depth 

 caudad, caudal margin sinuate, the greatest width of lobe ventrad, the ventro- 

 caudal angle full and rounded. 



Tegmina suri)assing the apex of the abdomen by about four-fifths the length 

 of the caudal femur, greatest width contained slightly more than five times 

 in greatest length of same; costal margin with a distinct, but low and rela- 

 tively short, proximal lobation, distad distinctly arcuate to the rounded acute 

 apex; sutural margin in general subparallel to costal; distal margin obliquely 

 arcuato-truncate : texture coriaceous proximad, becoming more membranous 

 and less closely areolate in distal fourth: intercalary vein present, proximad 

 nearer the ulnar, distad nearer the median vein. Wings moderately long, 

 greatest width contained one and three-quarter times in length of same; apex 

 rounded rectangulate. 



Interspace between mesosternal lobes strongly transverse, shallow, the lobes 

 obliquely arcuato-truncate caudad: interspace between metasternal lobes 

 strongly transverse, but little narrower than mesosternal interspace, regular. 



Cephalic and median limbs moderately slender. Caudal femora about half 

 as long as the tegmen, of the form usual in the subfamily, greatest width 

 contained three and one-half times in the length, with the lamellation of dorsal 

 carina little indicated and not sharply terminated distad, as in most of the indi- 

 viduals of the genus; pattern of the external paginae regular: caudal tibiae 

 slightly shorter than the caudal femora, armed on the external margin with 

 ten spines and on the internal margin with eleven si)ines: caudal tarsi relatively 

 short, the metatarsus subequal in length to the other two joints coml)ined. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 



Description of Allotype. — Differs from the dcscri{)tioii of the tyi)e in the fol- 

 lowing noteworthy features. 



Size rather large: form slightly more robust: surface more rugulose, and of 

 dorsum of ])r()notum more extensively rugose. Head with whole facial profile, 

 including fastigio-facial angle, less Ijulging, more regularly low arcuate, with 

 barely api)reciable sirmosities: width across genac about one and a third that 



